Bioinformatics Cheat Sheet

1 Feedback so far…

-Add blank lines to break up chunks of code to make it easier to read

-Increase code efficiency by merging multiple variables into one vector

2 Table of useful functions

Code	Meaning
+	Add
-	Subtract
/	Divide
*	Multiply
^	Power
Inf	Infinite
NaN	Not A Number
NA	Not Available
c()	Combine multiple variables into one vector
[x]	Pull out specific value from vector
""	Create character vectors
as.factor(x)	Converts variable names into factors
==	Equal to
!=	Not equal to
<	Less than
>	More than
<=	Less than or equal to
>=	More than or equal to
|	Or
%in%	Within
&	To combine multiple logical operators

3 Writing functions

Allows specifying multiple arguments within one custom made function if placed within {} brackets

mm <- function(x){
  ##sort vector from smallest to largest
  ##retrieve first and last value in vector
  MINMAX <- sort(x)[c(1,length(x))]
  ##add `return()` to give wanted value 
  return(MINMAX)
}

4 RMarkdown

4.1 Gifs/Images

To insert images you must have the image saved in same folder as RMarkdown file

<center> ![A caption for the image](the image name.gif) </center>

<center> before centers the image/object and </center> after stops that